|Pos.|Car #|Driver|Make|Team|
|---|---|---|---|---|
|1|38|Jason Leffler|Toyota|Braun Racing|
|2|16|Greg Biffle|Ford|Roush Fenway Racing|
|3|99|David Reutimann|Toyota|Michael Waltrip Racing|
|4|60|Carl Edwards|Ford|Roush Fenway Racing|
|5|77|Ron Hornaday|Chevrolet|Kevin Harvick Incorporated|
|6|20|Aric Almirola|Chevrolet|Joe Gibbs Racing|
|7|29|Scott Wimmer|Chevrolet|Richard Childress Racing|
|8|42|Kevin Hamlin|Dodge|Chip Ganassi Racing|
|9|10|Mike Bliss|Toyota|Braun Racing|
|10|88|Brad Keselowski|Chevrolet|JR Motorsports|

Question: how many chevrolets were in the top 10?
Answer: 4